New crust is continually being pushed away from divergent boundaries (where sea-floor spreading occurs), increasing Earth's surface. But the Earth isn't getting any bigger. What happens, then, to keep ...

Build mountains. Trigger volcanoes. Create new sea floor. You now have the power to change the landscape with the slightest push of your mouse. Four types of plate tectonic activity are demonstrated ...

Earthquakes were felt recently in Concord, pictured here, and nearby Loudon. Earthquakes might be better associated with states like California. But central New Hampshire also saw some seismic ...